40147745 has 16 divisors (see below), whose sum is σ = 54371520. Its totient is φ = 28190400.

The previous prime is 40147711. The next prime is 40147747. The reversal of 40147745 is 54774104.

It is not a de Polignac number, because 40147745 - 2¹⁴ = 40131361 is a prime.

It is a super-2 number, since 2×40147745² = 3223682857170050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40147747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10991 + ... + 14180.

It is an arithmetic number, because the mean of its divisors is an integer number (3398220).

Almost surely, 2^40147745 is an apocalyptic number.

It is an amenable number.

40147745 is a deficient number, since it is larger than the sum of its proper divisors (14223775).

40147745 is a wasteful number, since it uses less digits than its factorization.

40147745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25216.

The product of its (nonzero) digits is 15680, while the sum is 32.

The square root of 40147745 is about 6336.2248224002. The cubic root of 40147745 is about 342.4157393020.

The spelling of 40147745 in words is "forty million, one hundred forty-seven thousand, seven hundred forty-five".